Siemens Building Technologies Zone Valves Catalog Page

Thermic Actuator

Siemens
Product Guard
Warranty

24 Vac/Vdc, Two-Position control
Spring Return

Zone Valves

Thermic Electronic Valve Actuator.

Description

Thermic Actuators require a 24 Vac/Vdc control signal to
provide two-position, NO or NC control. This actuator is
designed to work with Zone Valves with a 1/10-inch
(2.5 mm) stroke.

Features

• Direct-coupled — install without tools

• Movement and position indication

• Robust, no maintenance required

• Friction-free

• Two-wire connection

• Standard versions with 3.9 foot connecting cable

• PWM control

• AC/DC two-position control

Applications

Thermic Actuators are for use with 1/10-inch (2.5 mm)
stroke Zone Valves.

A-119

Valves

Siemens
Product Guard
PLUS 3 Warranty

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Thermic Actuator Specifications

A-120

Power Supply

Supply Voltage ........................................24 Vac, 50 to 60 Hz or 24 Vdc

Power Consumption ................ Normal Operation 2.5W; Power on 6 VA

Switch-on Current (Transient) .................................................... 250 mA

Stroke ...................................................................Max. 0.18 in. (4.5 mm)

Nominal Force ...................................................................22.5 lb. (100N)

Positioning Time

at 65ºF (20ºC) ............................................................................270 sec

Permissible Temperature of Medium in Valve ........34-230ºF (1-110ºC)

Thermic Actuators
Product Ordering

Actuator

Prex

Description Part No.

24 Vac/Vdc, Normally Closed STA73U 346
24 Vac/Vdc, Normally Open STP73U 347

Code

Operation

Temperature ...................................................... 41 to 122°F (5 to 50°C)

Humidity ..................................................................................<85% RH

Storage

Temperature ...................................................... 41 to 122°F (5 to 50°C)

Humidity ...........................................................................5 to 100% RH

Transport

Temperature .................................................... -4 to 140°F (-20 to 60°C)

Humidity ..................................................................................<95% RH

Agency Approvals ....................................Conforms to CE Requirements

Dimensions (H x W x D) .................. 2.9 x 2.6 x 1.7 in. (74 x 65 x 44 mm)

Shipping Weight ...............................................................0.4 lb. (0.18 kg)

Valves

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